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1.摘心破坏了油菜的顶端优势,对植株的结构引起了很大的变化。例如第一、二、三分枝的生长速度加快了,分枝长度、分枝重量及分枝上的角果数都有了增加,可是这仍不能弥补由于摘心而减少的主花序及摘心点以上诸分枝的角果数,故而摘心引起了减产。2.油菜抽苔期同化产物主要分配在茎中占总输出量的72.8%,芽12.6%,根13.8%,叶0.7%。个别叶片的同化产物在叶及芽中的分配有一定的区域性,这可能与叶序密切有关。3.抽苔期无论摘心与否大部分的同化产物都是分配在茎中,其次是芽和根,叶片中分配最少,可是在具体的分配比例上有所不同。
1. Topping disrupts the top advantage of the rapeseed and causes a large change in the plant’s structure. For example, the growth rate of the first, second and third branches accelerated, and the branch length, branch weight and the number of pods on the branches increased. However, this still did not make up for the decrease in the number of main inflorescences More than the number of branches of the pod, therefore pinching caused a cut. 2. The main distribution of rape assimilation products during bolting stage was 72.8% of total output in shoots, 12.6% in buds, 13.8% in roots and 0.7% in leaves. The distribution of the assimilation products of individual leaves in the leaves and buds has a certain regional, which may be closely related with the leaf sequence. Most of the assimilation products in the bolting stage were assigned to the stems regardless of the topping or not, followed by buds and roots, with the least distribution in the leaves, but the specific proportions varied.